| 主权项 |
1. A method for attaching/removing a vane ring in a rotary machine, the rotary machine being provided with:
a rotor rotating about an axis, a casing covering the rotor allowing the rotor to rotate, and a vane ring formed in an annular shape about the axis and provided on an inner circumferential side of the casing, the vane ring being able to split into a plurality of vane segments in a circumferential direction about the axis, the casing being able to split into a plurality of partial casings in the circumferential direction, and vane ring grooves depressed from an inside in a radial direction toward an outside in the radial direction with reference to the axis and extending in the circumferential direction being formed in each of the plurality of partial casings, and the plurality of vane segments being mounted in the vane ring grooves of any the partial casing out of the plurality of partial casings, the method comprising: a casing disposing step of disposing a target casting, with a split surface of the target casing, at which the target casing is separated from another partial casing, facing downward, at a workable position where a space is secured such that it is possible to dispose a target segment below the target casing, the target casing being any partial casing out of the plurality of partial casings, and the target segment being the vane segment attached or to be attached to the target casing; and a segment moving step of moving the target segment in the circumferential direction with respect to the target casing disposed at the workable position, and disposing the target segment in the space below the target casing or mounting the target segment in the vane ring groove of the target casing. |
